Unlike mainstream superhero comics of the same era, Mort Cinder dealt with philosophical questions and historical trauma. It is considered a precursor to the graphic novel medium. The stories are episodic, often placing Mort in historical settings where he acts as a witness to human folly, making it a timeless critique of war and power.
It is a colloquial, fan-made term for the high-resolution, often illegally scanned copies of Mort Cinder and Breccia’s other works circulating on forums like 4chan’s /co/ (comics board) and various torrent trackers. The "cinder" refers to Mort Cinder; the "pdf" is the format that houses the ashes.
. Oesterheld’s writing reflects his beliefs in the resilience of common people against oppressive forces, a theme that became tragic reality when he was "disappeared" by the Argentine military dictatorship in 1977. : Breccia’s work on Mort Cinder
: Cinder recounts his past lives—ranging from the construction of the Tower of Babel to the Battle of Thermopylae and World War I—triggered by artifacts found in Ezra's shop. The Nature of Immortality